win_splitloader_auto

YARA detection rule by Felix Bilstein - yara-signator at cocacoding dot com

Detects win.splitloader.

rule win_splitloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.splitloader."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.splitloader"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    


    strings:
        $sequence_0 = { 418b8424f82a0000 4129b424fc2a0000 297518 01751c 418b8c24fc2a0000 03c6 }
                                                                                    
        $sequence_1 = { ffc2 4183f802 7514 81fa04010000 730c 4885c9 }
                                                                                    
        $sequence_2 = { 4883c108 48ffcb 7409 488b05???????? ebe6 4533c0 488d1593970000 }
                                                                                                
        $sequence_3 = { ff15???????? 85c0 7445 4863ef 488d0dfcb20000 }
                                                                        
        $sequence_4 = { 4883c002 66443918 74f6 0fb708 85c9 7467 }
                                                                                    
        $sequence_5 = { 7436 90 66413bc1 742f }
                                                            
        $sequence_6 = { 488b442470 4c2bdb 4c8918 41f6c209 0f8432010000 4585e4 0f8829010000 }
                                                                                                
        $sequence_7 = { ff15???????? 448b5c2440 41bc08000000 8bd6 458bd4 448bce }
                                                                                    
        $sequence_8 = { eb0a 4883c002 41ba22000000 0fb708 6683f922 7438 90 }
                                                                                                
        $sequence_9 = { 6644391f 750e 0f1f4000 4883c702 }
                                                            
    condition:
        7 of them and filesize < 174080
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

a55cfaa0-e6e5-4664-96c6-ace797136282

Propose edits, view related rules, and engage with the community through comments.

Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

Community Discussion